Governing system for prime movers



Sept. 5, 1933. J. GARDNER ET AL GOVERNIVNJG SYSTEM FOR PRIME uovmns Filed May 28, 1930 gar/776k 7 l: \vw

i atentecl Sept. 5, 193

UNITED STATES PATENT OFFICE .ioseph Gardner and Jose Patricroft, signers to near Manchester, England,

L. Gardner ph Hugh Stott Gardner,

as- & Sons Limited,

Patricroft, near Manchester, England Application May 28, 1930, Serial No. 456,674, and in Great Britain October 12, 1929 3 Claims.

lhis invention relates to governing systems for prime movers, more particularly oil engines of the pump injection type in which the governing of the engine is effected by varying the fuel charge which is injected into the engine cylinder or cylinders at or at about the end of the compression stroke or strokes.

The object of our present invention is to provide improved means for facilitating the starting 1 of the engine.

Our invention comprises the combination with the governor of a member movable by the g0vernor, a link connected to the member and transmitting the movements of the member to vary 1 the supply of motive fluid to the prime mover, an arresting device which normally prevents the link and member following fully the movement of the governor when the prime mover is stopped, and means for temporarily putting the arresting means out of action to permit the member to follow fully the movement of the governor to increase the supply of motive fluid, the said arresting device automatically becoming re-operative at increased governor speed. Referring to the accompanying sheet of explanatory drawing:

Figure l is a diagrammatic view illustrating one convenient application of our invention.

Figure 2 shows the emergency starting arrangement in its position for normal running of the engine to which it is applied.

The same reference letters in the different views indicate the same parts.

In the illustrated application of our invention, we provide an arm a pivoted upon a governor operated lever link or the like b which regulates the action of the pump or pumps supplying fuel to the engine controlled by the governor c as .hereinafter described. Said arm a normally abuts against a fixed stop 01 when the engine is under full load conditions and the predetermined maximum fuel charges are being injected into the engine cylinder or cylinders. The arm .a and stop d therefore act to limit the movement of the governor controlled member I) in the direction indicated by the arrow e which increases the fuel charge being injected into the engine. At starting, the arm a and stop d will be in engagement and so the normal maximum charges would be injected into the engine, but by means of a hand operated spring loaded plunger 1 or like means which when disengaged return automatically to an out-ot-service position, the arm a can i be moved clear of the stop as shown in Figure 1, when the governor controlled member I) can have a further movement to provide for larger charges being injected into the engine. This facilitates starting. It will be seen that when the parts a and d are in engagement, the part g of the governor operated lever It cannot follow fully the plunger z controlled by the centrifugal-weights 9' when the engine is stopped (see Figure 2), but when the part a is clear of d, the part g comes into engagement with i as shown in Figure 1.

When the hand operated means or plunger 1 is released, the arm. a returns to a position in which it can engagethe stop (2 after the governor has taken control of the engine by tending to reduce the fuel charges. We thus ensure that during normal running, the maximum predetermined charges for full load conditions are not exceeded. The pivoted arm a, stop d and the part of the hand operated plunger 1 which engages the arm a are enclosed in a casing so that they cannot be tampered with; the increased charges are therefore only made available whilst the engine attendant holds the arm a clear of the stop (1 through that portion of the loaded plunger j which is available for manipulation.

We may vary the details of the means for providing the excess fuel charges at starting, whilst limiting the charges during normal running to suit any particular requirements. We do not limit ourselves to any particular means for controlling the fuel charges from the governor controlled member b. The latter may actuate a lever in and a rod n which is coupled toa rack 0 (Figure 3) adapted .to turna sleeve 17 connected by a crosshead q to a plunger 1" which has a circular or spiral groove s in an extension thereof. 1? indicates the pump inlet ports and u the pump delivery valve. The fuel from '0 goes to the engine cylinder. The plunger is reciprocated by a cam acting on the head 20, the spring a: returning the plunger. By turning the plunger through the rack o, the point in the pump delivery stroke at which a port if is uncovered by the plunger can be varied and so the amount of the delivery altered for each pump stroke.

What we claim is:-

1. In governing systems for prime movers, the combination of a governor, a member movable by said governor, a link connected to said member and transmitting the movements of said member to vary the supply of motive fluid to the prime mover, an arresting device which normally prevents said link and member following fully the movement of said governor when the prime mover is stopped, and means for temporarily putting said arresting means out of action to permit said member to follow fully the movement of said governor to increase the supply of motive fiuid, said arresting device automatically becoming reoperative at increased governor speed.

2. In governing systems for prime movers, the combination of a governor, a member movable by said governor, a link connected to said member and transmitting the movements of said member to vary the supply of motive fluid to the prime mover, an arm pivoted upon said link, a fixed stop against which said arm normally abuts to prevent said link and member from following fully the movement of said governor when the prime mover is stopped, and a spring loaded plunger manually operable to temporarily pivot said arm out of the path of said stop to permit said member to follow fully the movement of said governor to increase the supply of motive fluid, said pivoted arm automatically falling back into abutment with said stop at increased governor speed. i

3. In governing systems for prime movers, the

combination of a governor having a stem which moves axially with variation in governor speed, a spring, a pivotally mounted member pivotal in one direction by said stem and in the other direction by said spring, a link connected to said memher and transmitting the movements of said member to vary the supply of motive fluid to the prime mover, an arm pivoted upon said link, a fixed stop against which said arm normally abuts to prevent said link and member from following fully the movement of said governor when the prime mover is stopped, and a spring loaded plunger manually operable to temporarily pivot said arm out of the path of said stop to permit said member to follow fully the movement of said governor to increase the supply of motive fluid, said pivoted arm automatically falling back into abutment with said stop at increased governor speed.

JOSEPH GARDNER. JOSEPH HUGH STOT'I GARDNER. 

